are these for fun or commercial?
the HDR is not good, halos colour shifts etc
tell tale fuzziness and loss of IQ from photomatix rendering
what would you use instead of photomatics?
luminosity masks http://www.goodlight.us/
he has updated his actions to a photoshop panel now which makes them easier
or even just mask blending
the things i hate about photomatix nik software etc and any tone mapping slidder app is
1) image fuzziness no matter how hard you try the composite tone mapped image has this fuzziness to it (hard to quantify but it directly attributes part of that surreal look to the image)
2) halos they apear everywhere and are dead giveaways and sometimes really hard to get rid of
3) wild uncontrolable colour shifts, vegetation and people suffer the worst
4) dirty whites the clouds in that first shot are good example of this
revup manages to get some pretty decent results out of photomatix but still I would be very carefull about using that program with any images for paying clients
thing is with HDR the line between WOW and WOAH! is very very thin and also quite subjective
but have a read of those tutorials from tony its very informative